电力系统及其自动化学报2019，Vol.31Issue(1)：1-6,6.DOI:10.3969/j.issn.1003-8930.2019.01.001
基于偏最小二乘回归的高精度同步时钟
High-precision Synchronous Clock Based on Partial Least Squares Regression
摘要
Abstract
To improve the stability and precision of a synchronous clock,a method to generate a high-precision synchro?nous clock based on partial least squares regression(PLSR)is put forward,which transforms the nonlinear relationship between the satellite clock and crystal oscillator clock deviation equation into a quasilinear relationship. Then,PLSR modeling is performed so as to obtain the estimated value of error of the crystal oscillator clock. When the satellite clock is working well,the frequency of the crystal oscillator will be modified according to the estimated value of error,and a real-time active compensation of the crystal oscillator clock’s accumulative error will be made,thus a high-precision synchronous clock can be generated;when the satellite clock is invalid,the high-precision synchronous clock will be provided by the crystal oscillator clock referring to the estimated value of error before the failure occurs. Simulation re?sults show that the synchronous clock generated using this method features high precision and high stability,which can output a high-precision time sync signal with satisfying stability even for a time period after the satellite clock failure.关键词
卫星时钟/晶振时钟/偏最小二乘回归/高精度同步时钟/误差估计值Key words
satellite clock/crystal clock/partial least squares regression(PLSR)/high-precision synchronous clock/estimated value of error分类
信息技术与安全科学引用本文复制引用
李泽文,邹彬,赵廷,杜昱东,郭田田..基于偏最小二乘回归的高精度同步时钟[J].电力系统及其自动化学报,2019,31(1):1-6,6.基金项目
国家自然科学基金资助项目(51577013)、湖南省自然科学杰出青年基金资助项目(2015JJ1001) （51577013）
